How Can We Reduce Carbon Dioxide Emissions

The video discusses the weight of exhaust gases compared to petrol, explaining that exhaust gases are heavier due to added oxygen. It explains the natural carbon cycle, highlighting why exhaled CO2 doesn't increase atmospheric CO2. The video compares historical biofuels with modern fossil fuels and emphasizes the need for energy efficiency and alternative energy sources to reduce carbon emissions. It suggests improving efficiency in lighting, transport, and home insulation, and explores alternative energy sources like hydroelectricity, wind, solar, and nuclear energy.

Why are exhaust gases from a car heavier than the petrol used?

• Because they are compressed

• Because they contain more carbon

• Because they are in liquid form

• Because they include added oxygen

What is the main reason carbon dioxide from respiration does not increase atmospheric CO2 levels?

• It is absorbed by oceans

• It is part of the natural carbon cycle

• It is converted into oxygen

• It is stored in the body

What was the primary source of energy 200 years ago?

• Biofuels

• Fossil fuels

• Nuclear energy

• Solar panels

Which type of light bulb is most efficient in terms of electricity usage?

• Fluorescent bulbs

• LEDs

• Halogen bulbs

• Filament bulbs

What is a significant advantage of using natural gas over coal for electricity generation?

• It requires less infrastructure

• It is more abundant

• It is cheaper

• It produces less carbon dioxide