Oraciones en ingles del cuidado del medio ambiente que tengan should?

Necesito oraciones comparativas y superlativas que tengan que ver con el cuidado del medio ambiente en ingles?

1. Plastic is one of the cheapest and the most common materials on the planet. 2. Plastic is less biodegradable than paper. 3. The beach became cleaner after her campaign. 4. Cardboard isn't as toxic as plastic. 5. The…