Science and technology can bring benefits to people's lives. A benefit is a positive effect of a product or a process.
How has the use of low sulfur fuel benefited people?
Low sulfur fuel significantly reduced the emission of sulfur dioxide from cars. This has benefited people's health.
A risk is an estimate of the likelihood that an undesired outcome will happen. The size of a risk is estimated based on the chance of it happening in a large sample, and over a specified length of time.
Advances in science and technology can bring risks. Scientists devise ways to reduce these risks.
The burning of fossil fuels increases the emission of air pollutants such as carbon dioxide. This gas is a greenhouse gas. Increased emissions of greenhouse gases brings a risk to human health and of climate change.
Scientists have designed catalytic converters and gas scrubbers to help mitigate (reduce) these emissions.
What is a risk of using nanoparticles?
Nanoparticles are so small that they are easily breathed in or can enter the body through broken skin. There is a risk that this could cause health problems.