1. Smoking cigarettes is a cause of lung cancer due to the harmful chemicals and carcinogens that are found in them.
2. There is evidence to suggest that global warming is primarily a result of human activity and increased greenhouse gas emissions.
3. The effectiveness of capital punishment as a deterrent to crime is a complex issue with ongoing debates.
4. It can be argued that renewable energy sources such as solar and wind power offer significant environmental benefits compared to traditional fossil fuels.
5. Some believe that modern methods of factory farming pose ethical concerns related to animal welfare.