Complex sentence: The plan would support conservation of land and water resources and developing actionable climate science, and to encourage other countries to take action to address climate change, including reducing deforestation and lowering subsidies that increase use of fossil fuels.
Split into simpler sentences: The plan would support conservation of land and water resources and developing actionable climate science. He would encourage other countries to take action to address climate change, including reducing deforestation and lowering subsidies that increase use of fossil fuels.