There are two types of sources of energy. Such as coal, oil, nuclear so on they are non - renewable sources and solar, wind, hydro, biogas, are renewable sources. They play an important role in our daily life so we should save energy. First of all we should turn off all light fans, air conditions when we don' t use them. Secondly we can use solar energy instead of electric energy in our house it will help us save much money. Thirdly we can go to school by bike on public transport Cho mình xin 5 sao, cảm ơn và câu trả lời hay nhất với ah