1. According to the speaker, more and more greenhouse gases are produced by A) a heat from the sunB) atmosphere changeC)actions of peopleD) no answer in the recording2. Which of these things is a greenhouse gas?A) carbon monoxideB) carbon dioxideC)oxygenD) no answer3. Which of these things can help reduce levels of carbon dioxide?A) Driving to workB) Heating with coalC)Using public transportD) Leaving your TV onchance does the speaker make?​