Question

what has caused greenhouse gases to increase? (select all that apply) more plant growth riding a bike clear cutting forests burning of fossil fuels

Explanation:

Plants absorb carbon - dioxide (a greenhouse gas), so more plant growth reduces greenhouse gases. Riding a bike is a low - carbon activity and doesn't increase greenhouse gases. Clear - cutting forests reduces the number of trees that can absorb carbon - dioxide, increasing greenhouse gases. Burning fossil fuels releases large amounts of carbon - dioxide and other greenhouse gases.

Answer:

C. clear cutting forests, D. burning of fossil fuels