Anthropogenic black carbon, or soot, arises from incomplete combustion of organic materials, significantly impacting climate change and public health. It causes global warming, degrades air quality, and leads to various health issues. Major contributors include residential fuel usage and transportation emissions. Reducing black carbon relies on cleaner fuel access and improved combustion technologies.
Approximately 91% of transportation energy globally comes from petroleum fuels, creating 29% of US and 20% of global greenhouse gas emissions. Biofuels offer potential emission reductions but raise land use concerns. Ethanol’s carbon emissions have decreased, and ongoing research aims to further reduce them. Government support and investments are driving biofuel expansion.
Many experts advocate for “putting a price on carbon” to reduce greenhouse gas emissions and address climate change. This involves capturing the external costs of emissions and linking them to their sources through a price. Approaches include emissions trading systems (e.g., “cap and trade”) and carbon taxes. Currently, 73 initiatives cover 23% of global emissions, with examples in South Africa and the European Union.
Economic policies impact the volume and nature of energy use and pollutants, including greenhouse gases. Government interventions typically include emissions trading, carbon taxes, and excise taxes. The OECD found that tax and subsidy policies influence GHG emissions and energy consumption globally. Current energy tax policies, however, do not align with GHG reduction goals.
Methane emissions from coal mines are a significant concern for greenhouse gas reduction. Certain mines, known as “superemitters,” contribute a large proportion of global methane emissions. Factors like mine depth and coal rank affect methane content. While reducing coal use in electricity generation is important, mitigating methane emissions from mines needs greater attention.
Boston strives for carbon neutrality by 2050, but faces hurdles with its reliance on fossil fuels. Buildings contribute most to emissions, driven by electricity and natural gas. Decarbonizing the grid and eliminating natural gas are vital for success. While progress has been made, meeting targets remains uncertain. Priorities include electrifying buildings, local energy planning, coastal resilience, and climate justice.
Renew Boston Trust is a program launched by the City of Boston to improve energy efficiency in municipal buildings. By implementing energy conservation measures, such as lighting upgrades and weatherization, the program aims to reduce energy use and lower greenhouse gas emissions