Positive impacts

Science and technology can bring benefits to people's lives. A benefit is a positive effect of a product or a process.

For example:

Question

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.

Risks

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.

For example:

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.

Question

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.