The best option for most people is to get a casket that is easily biodegradable, but not all funeral homes offer them.
Traditional cremation requires a hot fire that produces carbon emissions and uses fossil fuel.
A new cremation method uses an alkaline solution heated to 300 degrees that liquefies human remains. Instead of producing ashes, the remains are a brown liquid substance that resembles maple syrup. The method does not use fossil fuels and does not emit carbon.
California is the 15th state to allow this form of water-cremation. If it becomes popular there, it may move to other states, including yours.