What substance prevents the escape of heat radiated from earths surface?

What does the kyoto protocol aim to reduce

Migrant workers who fill employment needs in their host country often send remittances to their home countries

To obtain a microcredit loan, a person typically must a. be a male and have a source of income b. provide collateral and sign paperwork c. verbally promise to pay back the money d. have a good credit history select the best answer from the choices provided. a b c d