Пепевод We use the energy for three main things: electricity production, heating and transport. For the first two, we have options such as solar and wind power, or natural gas. But oil is still the world’s number one source of energy, and for transport at least, there is currently no alternative. In China, domestic energy consumption go up year by year and demand in similar regions catching up fast. We know how to use energy more efficiently now than in the past but the worldwide rise in demand causing concern amongst experts. Some experts think that oil supplies will start to fall within the next twenty years. Most experts agree that we need to find a new source of energy soon