A plan for drastically reducing greenhouse gas emissions could create thousands of jobs and be worth $2 billion for Maryland in energy savings and revenue, according to a report released Wednesday by the Commission on Climate Change.

“Energy efficiency is the fastest and least expensive approach available to reduce [greenhouse gas] emissions,” the report states.

The commission’s report outlines 42 policies that would allow the state to reduce global warming pollution 40 percent to 50 percent by 2020. Gov. Martin O’Malley instructed the committee in April 2007 to determine the consequences of climate change and ways to reduce emissions.