封面
市场调查报告书
商品编码
1500814

替代燃料汽车市场:2024-2031年全球产业分析、规模、占有率、成长、趋势、预测

Automotive Alternative Fuel Vehicle Market: Global Industry Analysis, Size, Share, Growth, Trends, and Forecast, 2024-2031

出版日期: | 出版商: Persistence Market Research | 英文 247 Pages | 商品交期: 2-5个工作天内

价格
简介目录

Persistence Market Research最近发布了一份关于全球替代燃料汽车市场的综合报告。本报告全面评估了市场驱动因素、趋势、机会、驱动因素和挑战等关键市场动态,并提供了有关市场结构的详细见解。本研究报告提供了独家资料和统计资料,概述了2024年至2031年全球替代燃料汽车市场的预期成长轨迹。

替代燃料汽车市场的主要见解

  • 市场规模(2024年)4.273 亿美元
  • 市场预测(2031年):9.507 亿美元
  • 全球市场成长率(2024-2031年年复合成长率):12.1%

替代燃料汽车市场-调查范围:

替代燃料汽车在减少碳排放和对传统燃料的依赖方面发挥重要作用。这些车辆采用多种技术,如混合动力电动、电池电动、燃料电池电动、天然气和生物燃料。该市场为消费者、车队营运商和公共交通提供多种车辆类型,包括乘用车、轻型商用车和巴士。

推动市场成长的因素:

全球替代燃料汽车市场受到几个关键因素的推动,包括严格的排放法规、消费者对环境永续意识的提高以及政府鼓励采用清洁技术的激励措施。传统化石燃料成本上升和地缘政治影响也推动了市场扩张。提高电池效率和开发电动车基础设施等技术进步将进一步推动市场成长。

市场限制因素:

儘管成长前景广阔,但汽车替代燃料汽车市场仍面临基础设施发展、电池技术限制和区域消费者接受度等挑战。电动车充电站的高初始成本和有限的可用性阻碍了电动车的广泛采用,特别是在基础设施欠发达的新兴经济体。

市场机会:

在电池技术进步、充电基础设施扩张以及消费者对永续交通解决方案偏好不断变化的推动下,替代燃料汽车市场呈现出巨大的成长机会。汽车製造商、能源公司和政府之间投资基础设施开发和研发的战略伙伴关係对于利用新机会和推动市场扩张非常重要。

本报告涵盖的主要问题

  • 推动全球替代燃料汽车市场成长的关键因素有哪些?
  • 哪些替代燃料类型和车辆细分市场在每个地区的采用率较高?
  • 科技进步如何改变汽车替代燃料汽车市场的竞争格局?
  • 谁是替代燃料汽车市场的主要参与者? 他们保持市场领先地位的策略是什么?
  • 全球替代燃料汽车市场的新趋势和未来前景是什么?

目录

第1章 执行摘要

第2章 市场概述

  • 市场范围与定义
  • 市场动态
    • 促进因素
    • 抑制因素
    • 机会
    • 作业
    • 主要趋势
  • 燃料类型生命週期分析
  • 汽车替代燃料汽车市场:价值链
    • 原料供应商名单
    • 製造商列表
    • 销售代理商名单
    • 应用清单
    • 获利能力分析
  • 波特五力分析
  • 地缘政治紧张局势:对市场的影响
  • 宏观经济因素
    • 世界产业展望
    • 世界 GDP 成长前景
    • 全球母公司市场概览
  • 预测因子-相关性和影响
  • 监管与科技环境

第3章 全球汽车替代燃料汽车市场展望:过去(2019-2023年)与预测(2024-2031年)

  • 主要亮点
    • 市场规模预测
    • 市场规模及年成长率
    • 绝对的机会
  • 市场规模分析与预测
    • 过去的市场规模分析,2019-2023年
    • 目前市场规模预测,2024年至2031年
  • 全球汽车替代燃料汽车市场展望:燃料类型
    • 简介/主要发现
    • 2019年至2023年依燃料类型划分的市场规模和数量的历史分析
    • 2024-2031年依燃料类型划分的当前市场规模与数量预测
      • 电动车
      • 混合动力
      • 插电式油电混合车
      • 燃料电池汽车
      • 天然气
      • 生质燃料
      • 其他气体燃料
  • 市场吸引力分析:燃料类型
  • 全球汽车替代燃料汽车市场展望:车辆类型
    • 简介/主要发现
    • 2019年至2023年依车型划分的市场规模与数量(辆)历史分析
    • 目前市场规模和数量(辆)预测(按车辆类型,2024-2031年)
      • 搭乘车
      • 轻型商用车
      • HCV
  • 市场吸引力分析:车辆类型
  • 市场吸引力分析:应用

第4章 全球汽车替代燃料汽车市场展望:地区

  • 主要亮点
  • 2019年至2023年依地区划分的市场规模和数量的历史分析
  • 2024-2031年依地区划分的当前市场规模与数量预测
    • 北美
    • 欧洲
    • 东亚
    • 南亚和大洋洲
    • 拉丁美洲
    • 中东、非洲(中东、非洲)
  • 市场吸引力分析:地区

第5章 北美汽车替代燃料汽车市场展望:过去(2019-2023年)与预测(2024-2031年)

第6章 欧洲汽车替代燃料汽车市场展望:过去(2019-2023年)与预测(2024-2031年)

第7章 东亚汽车替代燃料汽车市场展望:过去(2019-2023年)与预测(2024-2031年)

第8章 南亚和大洋洲汽车替代燃料汽车市场展望:过去(2019-2023年)和预测(2024-2031年)

第9章 拉丁美洲汽车替代燃料汽车市场展望:过去(2019-2023年)与预测(2024-2031年)

第10章 中东与非洲汽车替代燃料汽车市场展望:历史(2019-2023年)与预测(2024-2031年)

第11章 竞争态势

  • 2024年市占率分析
  • 市场结构
    • 依市场划分的竞争强度图
    • 有竞争力的类比 IC
    • 表观产品产能
  • 公司简介(详细资料-概述、财务状况、策略、近期发展)
    • Tesla, Inc.
    • Toyota Motor Corporation
    • Nissan Motor Corporation
    • General Motors
    • Volkswagen Group
    • Hyundai Motor Company
    • Ford Motor Company
    • Honda Motor Co., Ltd.
    • BMW Group
    • Daimler AG

第12章 附录

  • 调查方法
  • 调查假设
  • 首字母缩写词和缩写词
简介目录
Product Code: PMRREP33547

Persistence Market Research has recently released a comprehensive report on the worldwide market for automotive alternative fuel vehicles. The report offers a thorough assessment of crucial market dynamics, including drivers, trends, opportunities, and challenges, providing detailed insights into the market structure. This research publication presents exclusive data and statistics outlining the anticipated growth trajectory of the global automotive alternative fuel vehicle market from 2024 to 2031.

Key Insights: Automotive Alternative Fuel Vehicle Market

  • Market Size (2024E): USD 427.3 Million
  • Projected Market Value (2031F): USD 950.7 Million
  • Global Market Growth Rate (CAGR 2024 to 2031):12.1%

Automotive Alternative Fuel Vehicle Market - Report Scope:

Alternative fuel vehicles play a crucial role in reducing carbon emissions and dependency on conventional fuels. These vehicles encompass a variety of technologies such as hybrid electric, battery electric, fuel cell electric, natural gas, and biofuels. The market caters to consumers, fleet operators, and public transportation agencies, offering a range of vehicle types including passenger cars, light commercial vehicles, and buses.

Market Growth Drivers:

The global automotive alternative fuel vehicle market is propelled by several key factors, including stringent emissions regulations, increasing consumer awareness about environmental sustainability, and government incentives promoting adoption of cleaner technologies. The rising costs and geopolitical implications of traditional fossil fuels also drive market expansion. Technological advancements, such as improvements in battery efficiency and infrastructure developments for electric vehicles, further enhance market growth.

Market Restraints:

Despite promising growth prospects, the automotive alternative fuel vehicle market faces challenges related to infrastructure development, battery technology limitations, and varying consumer acceptance across different regions. High initial costs of electric vehicles and limited availability of charging stations pose barriers to widespread adoption, particularly in emerging economies with developing infrastructure.

Market Opportunities:

The automotive alternative fuel vehicle market presents significant growth opportunities driven by advancements in battery technology, expansion of charging infrastructure, and evolving consumer preferences towards sustainable transportation solutions. Strategic partnerships between automotive manufacturers, energy companies, and governments to invest in infrastructure development and research initiatives are essential to capitalize on emerging opportunities and drive market expansion.

Key Questions Answered in the Report:

  • What are the primary factors driving the growth of the automotive alternative fuel vehicle market globally?
  • Which alternative fuel types and vehicle segments are witnessing higher adoption rates across different regions?
  • How are technological advancements reshaping the competitive landscape of the automotive alternative fuel vehicle market?
  • Who are the key players contributing to the automotive alternative fuel vehicle market, and what strategies are they employing to maintain market leadership?
  • What are the emerging trends and future prospects in the global automotive alternative fuel vehicle market?

Competitive Intelligence and Business Strategy:

Leading players in the global automotive alternative fuel vehicle market, including Tesla, Toyota, Volkswagen, and BYD Company Ltd., focus on innovation, product differentiation, and strategic partnerships to gain a competitive edge. These companies invest in R&D to develop advanced vehicle technologies, expand their product portfolios, and enhance manufacturing capabilities. Collaborations with energy companies and government agencies facilitate infrastructure development and promote market penetration.

Key Companies Profiled:

  • Tesla, Inc.
  • Toyota Motor Corporation
  • Nissan Motor Corporation
  • General Motors
  • Volkswagen Group
  • Hyundai Motor Company
  • Ford Motor Company
  • Honda Motor Co., Ltd.
  • BMW Group
  • Daimler AG

Automotive Alternative Fuel Vehicle Market Research Segmentation

By Fuel Type Location:

  • BEV
  • HEV
  • PHEV
  • FCV
  • CNG
  • Biofuels
  • Other Gaseous Fuels

By Vehicle Type:

  • Passenger Car
  • LCV
  • HCV

By Region:

  • North America
  • Europe
  • East Asia
  • South Asia & Oceania
  • Latin America
  • Middle East & Africa

Table of Contents

1. Executive Summary

  • 1.1. Global Automotive Alternative Fuel Vehicle Market Snapshot, 2024-2031
  • 1.2. Market Opportunity Assessment, 2024-2031, US$ Mn
  • 1.3. Key Market Trends
  • 1.4. Future Market Projections
  • 1.5. Premium Market Insights
  • 1.6. Industry Developments and Key Market Events
  • 1.7. PMR Analysis and Recommendations

2. Market Overview

  • 2.1. Market Scope and Definition
  • 2.2. Market Dynamics
    • 2.2.1. Drivers
    • 2.2.2. Restraints
    • 2.2.3. Opportunity
    • 2.2.4. Challenges
    • 2.2.5. Key Trends
  • 2.3. Fuel Type Lifecycle Analysis
  • 2.4. Automotive Alternative Fuel Vehicle Market: Value Chain
    • 2.4.1. List of Raw Material Supplier
    • 2.4.2. List of Manufacturers
    • 2.4.3. List of Distributors
    • 2.4.4. List of Applications
    • 2.4.5. Profitability Analysis
  • 2.5. Porter Five Force's Analysis
  • 2.6. Geopolitical Tensions: Market Impact
  • 2.7. Macro-Economic Factors
    • 2.7.1. Global Sectorial Outlook
    • 2.7.2. Global GDP Growth Outlook
    • 2.7.3. Global Parent Market Overview
  • 2.8. Forecast Factors - Relevance and Impact
  • 2.9. Regulatory and Technology Landscape

3. Global Automotive Alternative Fuel Vehicle Market Outlook: Historical (2019-2023) and Forecast (2024-2031)

  • 3.1. Key Highlights
    • 3.1.1. Market Volume (Units) Projections
    • 3.1.2. Market Size and Y-o-Y Growth
    • 3.1.3. Absolute $ Opportunity
  • 3.2. Market Size (US$ Mn) Analysis and Forecast
    • 3.2.1. Historical Market Size Analysis, 2019-2023
    • 3.2.2. Current Market Size Forecast, 2024-2031
  • 3.3. Global Automotive Alternative Fuel Vehicle Market Outlook: Fuel Type
    • 3.3.1. Introduction / Key Findings
    • 3.3.2. Historical Market Size (US$ Mn) and Volume (Units) Analysis By Fuel Type, 2019-2023
    • 3.3.3. Current Market Size (US$ Mn) and Volume (Units) Forecast By Fuel Type, 2024-2031
      • 3.3.3.1. BEV
      • 3.3.3.2. HEV
      • 3.3.3.3. PHEV
      • 3.3.3.4. FCV
      • 3.3.3.5. CNG
      • 3.3.3.6. Biofuels
      • 3.3.3.7. Other Gaseous Fuels
  • 3.4. Market Attractiveness Analysis: Fuel Type
  • 3.5. Global Automotive Alternative Fuel Vehicle Market Outlook: Vehicle Type
    • 3.5.1. Introduction / Key Findings
    • 3.5.2. Historical Market Size (US$ Mn) and Volume (Units) Analysis By Vehicle Type, 2019-2023
    • 3.5.3. Current Market Size (US$ Mn) and Volume (Units) Forecast By Fuel Vehicle Type, 2024-2031
      • 3.5.3.1. Passenger Car
      • 3.5.3.2. LCV
      • 3.5.3.3. HCV
  • 3.6. Market Attractiveness Analysis: Vehicle Type
  • 3.7. Market Attractiveness Analysis: Application

4. Global Automotive Alternative Fuel Vehicle Market Outlook: Region

  • 4.1. Key Highlights
  • 4.2. Historical Market Size (US$ Mn) and Volume (Units) Analysis By Region, 2019-2023
  • 4.3. Current Market Size (US$ Mn) and Volume (Units) Forecast By Region, 2024-2031
    • 4.3.1. North America
    • 4.3.2. Europe
    • 4.3.3. East Asia
    • 4.3.4. South Asia and Oceania
    • 4.3.5. Latin America
    • 4.3.6. Middle East & Africa (MEA)
  • 4.4. Market Attractiveness Analysis: Region

5. North America Automotive Alternative Fuel Vehicle Market Outlook: Historical (2019-2023) and Forecast (2024-2031)

  • 5.1. Key Highlights
  • 5.2. Pricing Analysis
  • 5.3. Historical Market Size (US$ Mn) and Volume (Units) Analysis By Market, 2019-2023
    • 5.3.1. By Country
    • 5.3.2. By Fuel Type
    • 5.3.3. By Application
  • 5.4. Current Market Size (US$ Mn) and Volume (Units) Forecast By Country, 2024-2031
    • 5.4.1. U.S.
    • 5.4.2. Canada
  • 5.5. Current Market Size (US$ Mn) and Volume (Units) Forecast By Fuel Type, 2024-2031
    • 5.5.1. BEV
    • 5.5.2. HEV
    • 5.5.3. PHEV
    • 5.5.4. FCV
    • 5.5.5. CNG
    • 5.5.6. Biofuels
    • 5.5.7. Other Gaseous Fuels
  • 5.6. Current Market Size (US$ Mn) and Volume (Units) Forecast By Vehicle Type, 2024-2031
    • 5.6.1. Passenger Car
    • 5.6.2. LCV
    • 5.6.3. HCV
  • 5.7. Market Attractiveness Analysis

6. Europe Automotive Alternative Fuel Vehicle Market Outlook: Historical (2019-2023) and Forecast (2024-2031)

  • 6.1. Key Highlights
  • 6.2. Pricing Analysis
  • 6.3. Historical Market Size (US$ Mn) and Volume (Units) Analysis By Market, 2019-2023
    • 6.3.1. By Country
    • 6.3.2. By Fuel Type
    • 6.3.3. By Application
  • 6.4. Current Market Size (US$ Mn) and Volume (Units) Forecast By Country, 2024-2031
    • 6.4.1. Germany
    • 6.4.2. France
    • 6.4.3. U.K.
    • 6.4.4. Italy
    • 6.4.5. Spain
    • 6.4.6. Russia
    • 6.4.7. Turkey
    • 6.4.8. Rest of Europe
  • 6.5. Current Market Size (US$ Mn) and Volume (Units) Forecast By Fuel Type, 2024-2031
    • 6.5.1. BEV
    • 6.5.2. HEV
    • 6.5.3. PHEV
    • 6.5.4. FCV
    • 6.5.5. CNG
    • 6.5.6. Biofuels
    • 6.5.7. Other Gaseous Fuels
  • 6.6. Current Market Size (US$ Mn) and Volume (Units) Forecast By Vehicle Type, 2024-2031
    • 6.6.1. Passenger Car
    • 6.6.2. LCV
    • 6.6.3. HCV
  • 6.7. Market Attractiveness Analysis

7. East Asia Automotive Alternative Fuel Vehicle Market Outlook: Historical (2019-2023) and Forecast (2024-2031)

  • 7.1. Key Highlights
  • 7.2. Pricing Analysis
  • 7.3. Historical Market Size (US$ Mn) and Volume (Units) Analysis By Market, 2019-2023
    • 7.3.1. By Country
    • 7.3.2. By Fuel Type
    • 7.3.3. By Application
  • 7.4. Current Market Size (US$ Mn) and Volume (Units) Forecast By Country, 2024-2031
    • 7.4.1. China
    • 7.4.2. Japan
    • 7.4.3. South Korea
  • 7.5. Current Market Size (US$ Mn) and Volume (Units) Forecast By Fuel Type, 2024-2031
    • 7.5.1. BEV
    • 7.5.2. HEV
    • 7.5.3. PHEV
    • 7.5.4. FCV
    • 7.5.5. CNG
    • 7.5.6. Biofuels
    • 7.5.7. Other Gaseous Fuels
  • 7.6. Current Market Size (US$ Mn) and Volume (Units) Forecast By Vehicle Type, 2024-2031
    • 7.6.1. Passenger Car
    • 7.6.2. LCV
    • 7.6.3. HCV
  • 7.7. Market Attractiveness Analysis

8. South Asia & Oceania Automotive Alternative Fuel Vehicle Market Outlook: Historical (2019-2023) and Forecast (2024-2031)

  • 8.1. Key Highlights
  • 8.2. Pricing Analysis
  • 8.3. Historical Market Size (US$ Mn) and Volume (Units) Analysis By Market, 2019-2023
    • 8.3.1. By Country
    • 8.3.2. By Fuel Type
    • 8.3.3. By Application
  • 8.4. Current Market Size (US$ Mn) and Volume (Units) Forecast By Country, 2024-2031
    • 8.4.1. India
    • 8.4.2. Southeast Asia
    • 8.4.3. ANZ
    • 8.4.4. Rest of South Asia & Oceania
  • 8.5. Current Market Size (US$ Mn) and Volume (Units) Forecast By Fuel Type, 2024-2031
    • 8.5.1. BEV
    • 8.5.2. HEV
    • 8.5.3. PHEV
    • 8.5.4. FCV
    • 8.5.5. CNG
    • 8.5.6. Biofuels
    • 8.5.7. Other Gaseous Fuels
  • 8.6. Current Market Size (US$ Mn) and Volume (Units) Forecast By Vehicle Type, 2024-2031
    • 8.6.1. Passenger Car
    • 8.6.2. LCV
    • 8.6.3. HCV
  • 8.7. Market Attractiveness Analysis

9. Latin America Automotive Alternative Fuel Vehicle Market Outlook: Historical (2019-2023) and Forecast (2024-2031)

  • 9.1. Key Highlights
  • 9.2. Pricing Analysis
  • 9.3. Historical Market Size (US$ Mn) and Volume (Units) Analysis By Market, 2019-2023
    • 9.3.1. By Country
    • 9.3.2. By Fuel Type
    • 9.3.3. By Vehicle Type
  • 9.4. Current Market Size (US$ Mn) and Volume (Units) Forecast By Country, 2024-2031
    • 9.4.1. Brazil
    • 9.4.2. Mexico
    • 9.4.3. Rest of Latin America
  • 9.5. Current Market Size (US$ Mn) and Volume (Units) Forecast By Fuel Type, 2024-2031
    • 9.5.1. BEV
    • 9.5.2. HEV
    • 9.5.3. PHEV
    • 9.5.4. FCV
    • 9.5.5. CNG
    • 9.5.6. Biofuels
    • 9.5.7. Other Gaseous Fuels
  • 9.6. Current Market Size (US$ Mn) and Volume (Units) Forecast By Vehicle Type, 2024-2031
    • 9.6.1. Passenger Car
    • 9.6.2. LCV
    • 9.6.3. HCV
  • 9.7. Market Attractiveness Analysis

10. Middle East & Africa Automotive Alternative Fuel Vehicle Market Outlook: Historical (2019-2023) and Forecast (2024-2031)

  • 10.1. Key Highlights
  • 10.2. Pricing Analysis
  • 10.3. Historical Market Size (US$ Mn) and Volume (Units) Analysis By Market, 2019-2023
    • 10.3.1. By Country
    • 10.3.2. By Fuel Type
    • 10.3.3. By Application
  • 10.4. Current Market Size (US$ Mn) and Volume (Units) Forecast By Country, 2024-2031
    • 10.4.1. GCC
    • 10.4.2. Egypt
    • 10.4.3. South Africa
    • 10.4.4. Northern Africa
    • 10.4.5. Rest of Middle East & Africa
  • 10.5. Current Market Size (US$ Mn) and Volume (Units) Forecast By Fuel Type, 2024-2031
    • 10.5.1. BEV
    • 10.5.2. HEV
    • 10.5.3. PHEV
    • 10.5.4. FCV
    • 10.5.5. CNG
    • 10.5.6. Biofuels
    • 10.5.7. Other Gaseous Fuels
  • 10.6. Current Market Size (US$ Mn) and Volume (Units) Forecast By Vehicle Type, 2024-2031
    • 10.6.1. Passenger Car
    • 10.6.2. LCV
    • 10.6.3. HCV
  • 10.7. Market Attractiveness Analysis

11. Competition Landscape

  • 11.1. Market Share Analysis, 2024
  • 11.2. Market Structure
    • 11.2.1. Competition Intensity Mapping By Market
    • 11.2.2. Competition Analog IC
    • 11.2.3. Apparent Product Capacity
  • 11.3. Company Profiles (Details - Overview, Financials, Strategy, Recent Developments)
    • 11.3.1. Tesla, Inc.
      • 11.3.1.1. Overview
      • 11.3.1.2. Segments and Product
      • 11.3.1.3. Key Financials
      • 11.3.1.4. Market Developments
      • 11.3.1.5. Market Strategy
    • 11.3.2. Toyota Motor Corporation
      • 11.3.2.1. Overview
      • 11.3.2.2. Segments and Product
      • 11.3.2.3. Key Financials
      • 11.3.2.4. Market Developments
      • 11.3.2.5. Market Strategy
    • 11.3.3. Nissan Motor Corporation
      • 11.3.3.1. Overview
      • 11.3.3.2. Segments and Product
      • 11.3.3.3. Key Financials
      • 11.3.3.4. Market Developments
      • 11.3.3.5. Market Strategy
    • 11.3.4. General Motors
      • 11.3.4.1. Overview
      • 11.3.4.2. Segments and Product
      • 11.3.4.3. Key Financials
      • 11.3.4.4. Market Developments
      • 11.3.4.5. Market Strategy
    • 11.3.5. Volkswagen Group
      • 11.3.5.1. Overview
      • 11.3.5.2. Segments and Product
      • 11.3.5.3. Key Financials
      • 11.3.5.4. Market Developments
      • 11.3.5.5. Market Strategy
    • 11.3.6. Hyundai Motor Company
      • 11.3.6.1. Overview
      • 11.3.6.2. Segments and Product
      • 11.3.6.3. Key Financials
      • 11.3.6.4. Market Developments
      • 11.3.6.5. Market Strategy
    • 11.3.7. Ford Motor Company
      • 11.3.7.1. Overview
      • 11.3.7.2. Segments and Product
      • 11.3.7.3. Key Financials
      • 11.3.7.4. Market Developments
      • 11.3.7.5. Market Strategy
    • 11.3.8. Honda Motor Co., Ltd.
      • 11.3.8.1. Overview
      • 11.3.8.2. Segments and Product
      • 11.3.8.3. Key Financials
      • 11.3.8.4. Market Developments
      • 11.3.8.5. Market Strategy
    • 11.3.9. BMW Group
      • 11.3.9.1. Overview
      • 11.3.9.2. Segments and Product
      • 11.3.9.3. Key Financials
      • 11.3.9.4. Market Developments
      • 11.3.9.5. Market Strategy
    • 11.3.10. Daimler AG
      • 11.3.10.1. Overview
      • 11.3.10.2. Segments and Product
      • 11.3.10.3. Key Financials
      • 11.3.10.4. Market Developments
      • 11.3.10.5. Market Strategy

12. Appendix

  • 12.1. Research Methodology
  • 12.2. Research Assumptions
  • 12.3. Acronyms and Abbreviations