TLS Online TPP Program

#Question id: 9246


The main cause of the increase in the amount of CO2 in Earth's atmosphere over the past 150 years is

#9. Diversity of Life Forms
  1. increased worldwide primary production.
  2. increased worldwide standing crop.
  3. an increase in the amount of infrared radiation absorbed by the atmosphere.
  4. the burning of larger amounts of wood and fossil fuels