28. As people need more land to build houses, they cut down on more forests.
- Correction: As people need more land to build houses, they cut down more forests.
Explanation: The phrase "cut down on" implies reducing or decreasing, which is not the intended meaning here. The correct phrase should be "cut down," indicating the action of chopping down trees.

29. The more renewable energy sources we use, the more better our living conditions will become.
- Correction: The more renewable energy sources we use, the better our living conditions will become.
Explanation: "More better" is redundant as "more" and "better" both convey the idea of increase and improvement respectively. Using both together is unnecessary.

30. Responsible tourists will be aware from the environment when they travel.
- Correction: Responsible tourists will be aware of the environment when they travel.
Explanation: The correct preposition to use with "aware" in this context is "of" rather than "from."

31. Wild animals must be protected within their nature environment.
- Correction: Wild animals must be protected within their natural environment.
Explanation: "Nature environment" is redundant. The word "natural" alone is sufficient to convey the intended meaning.

32. Body shame is the practice of using offensive language about a person’s appearance.
- Correction: No error.
Explanation: The sentence is correct as it is.

33. In addition to we should enjoy our national parks, we should learn to protect them for future generations.
- Correction: In addition to enjoying our national parks, we should learn to protect them for future generations.
Explanation: The phrase "we should" should be placed before the gerund "enjoying" to maintain parallel structure with the phrase "we should learn." Also, "enjoying" is the correct form of the verb to use here.