A Reminder…The sources of greenhouse gases can be grouped into five categories 

• Transportation is the biggest, perhaps electric vehicles will reduce this number, over time. Hydrogen is still on the list. 
• Electricity generation is second. The chart below shows the contribition of renewable sources to the generation of electricty. 
• Industrial greenhouse gas emissions primarily come from burning fossil fuels for energy, as well as greenhouse gas emissions from certain chemical reactions necessary to produce goods from raw materials. 
• Commercial and residential construction accounts for13% of GHG emmissions. Local codes addressing materials, methods and waste can reduce this number. 
• Agriculture greenhouse gas emissions come from livestock such as cows, agricultural soils, and rice production. Human dietary changes such as the shift to plant based “meats” makes a difference. 

Local actions, actions by small cites and towns can affect all five sources of greenhouse gas emissions.