𝘾𝙝𝙤𝙤𝙨𝙚 𝙩𝙝𝙚 𝙘𝙤𝙧𝙧𝙚𝙘𝙩 𝙤𝙥𝙩𝙞𝙤𝙣.
Carbon dioxide ............ are responsible for the pollution of the environment.
emissions
speciments
layers