Price: $1.7 trillion over 10 years

Timeline: 100% clean energy economy and net-zero emissions by 2050

Key Elements
Leverage additional $3.3 trillion in private, state and local investments and invest $400 billion in clean energy research over 10 years. Create millions of new jobs. Tougher fuel-economy standards for vehicles and encourage electric cars. Roll back corporate tax cuts and end oil and gas subsidies to pay for the plan. Rally rest of world behind curbing temperature rises. Use carbon-capture technology and develop small modular nuclear reactors. Read about the candidate's plan here »

Price: $3 trillion over 10 years

Timeline: 100% carbon-free electricity by 2030, a carbon-neutral economy by 2045

Key Elements
Create an Environmental Justice Fund to be used for replacing lead-contaminated school and housing water systems, cleaning up abandoned coal mines and other projects. Would investe $400 billion in "Moonshot Hubs" in every state researching clean energy. End fossil fuel subsidies, phase out fracking, offer tax credits for wind, solar, energy storage and electric vehicles. Read about the candidate's plan here »

Price: $1.5 to $2 trillion in federal investment

Timeline: Net zero emissions by 2050

Key Elements
Supports a carbon tax, would restore Obama administration regulations overturned by President Donald Trump. Zero-emissions electricity by 2035, including new passenger vehicles through tax credits of up to $10,000 a vehicle. Net zero emissions for new heavy-duty vehicles, buses, trains, ships and aircraft by 2040. Supports carbon capture. Create more than 3 million clean energy and infrastructure jobs in the next decade. Read about the candidate's plan here »

Price: $10 trillion in public and private money over 10 years

Timeline: Net zero emissions by 2045

Key Elements
A mix of federal, state and private investments. A 50% reduction in emissions by 2030. Electricity to be carbon neutral by 2030, entirely clean, renewable and zero-emission by 2035. New light- and medium-duty vehicles and buildings zero emissions by 2030. Create 10 million jobs. Stop drilling for fossil fuels on public lands and end all taxpayer subsidies of fossil fuel production. Read about the candidate's plan here »

Price: $10 trillion in public and private money over 10 years

Timeline: 100% zero greenhouse gas emissions by 2045

Key Elements
Nationwide ban on fracking and on off-shore oil and gas drilling; expand tax credits to tax credits to reach 100% carbon-neutral electricity within 10 years. Increase vehicle fuel economy standards so that new passenger vehicles achieve zero emissions by 2035. Read about the candidate's plan here »

Price: $1 trillion

Timeline: Net zero emissions by 2050

Key Elements
In first 100 days, would reverse President Donald Trump's rollback of clean air and energy policies. Restore the Clean Power Plan to reduce power plant emissions and reinstate fuel economy standards for vehicles. No federal fracking ban. Put a price on carbon. Read about the candidate's plan here »

Price: $5 trillion in public and private money over 10 years

Timeline: Net zero emissions by 2050

Key Elements
First bill to Congress would be to mobilize $5 trillion for infratructure and innovation. Reduce methane leakage from oil and natural gas industry, leverage $500 billion in billion in annual government procurement to decarbonize, including a new "buy clean" program for steel, glass, and cement. Read about the candidate's plan here »

Price: $16.3 trillion over 15 years, more than any other candidate

Timeline: 100% renewable transportation and electric grid by 2030; eliminate fossil fuel use by 2050

Key Elements
Sanders' "Green New Deal" would build a 100% renewable transportation and electric grid by 2030, creating 20 million new jobs. “Complete decarbonization” of the energy sector by 2050, end federal investment in and subsidies for the fossil fuel industry entirely. Declare a national climate emergency. Increase penalties for corporate pollution and raise taxes on fossil fuel income and wealth. Read about the candidate's plan here »

Price: $2.3 trillion over 10 years

Timeline: 100% net zero emissions by 2045

Key Elements
Would declare climate change a national emergency, build a “Civilian Climate Corps” to be funded with $250 billion in bonds over 10 years and create 1 million jobs. $50 billion for wages and benefits to help fossil fuel workers make the transition to clean energy. $2 trillion for more resilient infrastructure and trillions more in private capital to investment in clean transportation, the energy grid, farms, building retrofits and other infrastructure. Read about the candidate's plan here »

Price: $3 trillion over 10 years

Timeline: 100% zero-emission electric generation by 2035

Key Elements
Draws on ideas of Washington Gov. Jay Inslee, who made climate change centerpiece of his discontinued presidential bid. Eliminate emissions from power plants, vehicles and buildings over 15 years. 100% zero-carbon pollution from new commercial and residential buildings by 2028; 100% zero emissions standards for new cars, buses and light- and medium-duty trucks by 2030 and 100% zero-emission electric generation by 2035; End coal-fired electricity within a decade and provide health care and pensions for coal miners; ban fossil-fuel leases on public land; spend $2 trillion on green manufacturing to be paid for by reversing tax cuts for corporations and the wealthy. Price on carbon. Read about the candidate's plan here »

Price: $4.87 trillion over 20 years, includes $400 billion in "Democracy Dollars" to allow Americans to chose a candidate

Timeline: 100% net zero emissions by 2045

Key Elements
Relies on nuclear energy. Phases in elimination of use of fossil fuels: net-zero emissions for buildings in 2025, new nuclear energy reactors begin to come online in 2027, zero-emission standard for new cars in 2030, 100% emissions free elecric grid in 2035, net-zero emissions for all transportation in 2040, 85% methane capture in 2045. Carbon tax that starts at $40 a ton and rises to $100 a ton. Read about the candidate's plan here »