The Boston Globe
After vetoing the initial bill and sending a second one back to lawmakers with a host of proposed amendments, Governor Charlie Baker on Friday signed a revised climate bill, establishing one of the nation’s most far-reaching efforts to reduce planet-warming carbon emissions.
The new law requires Massachusetts to reduce its carbon emissions by at least 50 percent below 1990 levels by 2030, 75 percent below those levels by 2040, and achieve “net zero” emissions by 2050. Given that it’s unlikely the state will eliminate all of its emissions, officials will have to plant trees or remove carbon dioxide from the atmosphere to offset any lingering use of fossil fuels or other sources of greenhouse gases.