Slash-and-burn agriculture affects global warming by a. adding more methane gas to the environment, thereby increasing greenhouse gases b. removing methane producers from the environment, thereby decreasing greenhouse gases c. removing photosynthetic organisms from the environment, thereby increasing co2 in the environment d. removing photosynthetic organisms from the environment, thereby decreasing co2 in the environment e. no effect will be seen in global warming or greenhouse gases from this type of agriculture.