4. Identify three ways alternative energy sources may contribute to the reduction of greenhouse gas emissions - Leaving Cert Home Economics - Question 4 - 2011

Renewable Energy Use: Utilizing renewable energy sources such as wind, solar, and hydroelectric power reduces the dependency on fossil fuels. Since these alternative sources do not emit carbon dioxide during operation, they significantly lessen greenhouse gas emissions compared to traditional energy generation methods.

Energy Efficiency Improvements: Alternative energy technologies often come with improved efficiency in energy consumption. For instance, electric vehicles powered by renewable energy can lead to lower per-mile emissions compared to gasoline-powered vehicles, contributing to overall reductions in greenhouse gases.

Sustainable Practices: The adoption of sustainable biomass energy and other alternative sources encourages practices that not only minimize emissions but also promote carbon sequestration. For example, plants used in biomass can absorb CO2 from the atmosphere, thereby offsetting emissions that might otherwise contribute to climate change.