Certainly! Here’s a simple and straightforward way to express your thoughts on these topics in British English:
I believe that there are vegetarians in my country. Many people choose to follow a vegetarian diet for various reasons, such as health, ethics, and environmental concerns.
I think that freeganism is absurd. Freeganism is the practice of reducing waste by finding food that has been discarded. While I understand the intention behind it, I find it hard to believe that it is a practical or sensible way to live.
I also believe that GMO (genetically modified organisms) does not affect humans in any significant way. There has been a lot of debate about GMOs, but many studies suggest that they are safe to eat and have no harmful effects on human health.
Feel free to adjust any part of the text if you'd like to express your opinions differently!