So far the researchers have been able to convert less than 1 percent of the energy in sunlight efficiently.

Fuel cells cleanly and efficiently convert natural gas and other fuels to electricity.

Some are able to efficiently convert the energy into liquid or gaseous fuels:

For example, it efficiently converts 1-methylxanthine (a metabolite of caffeine) to 1-methyluric acid, but has little activity on 3-methylxanthine.

Considering how difficult it is to efficiently convert heat to electricity.

Researchers have found a way to efficiently convert different human blood types into a neutral type that can be given to any patient.

In order to convert solar energy efficiently, a variety of approaches are being developed.

The constant is a measure of how efficiently an enzyme converts a substrate into product.

Cacti are good crops for dry areas because they efficiently convert water into biomass.

Some cells are designed to efficiently convert wavelengths of solar light that reach the Earth surface.