高考环保类单词的数量如下：

vivisection

perform experiments on animals

test animals

be subjected to experiments

animal rights

clinical research

cruel

extremist

challenge

consequence

conservation

effort

environment

expectation

permission

pollution

protection

punishment

Kyoto Protocol

environmental protection

eco-friendly

preserve

carbon footprint

carbon emission

ecosystem

eco-balance

ecology

biologist

biological

species

31. diversity

32. bacteria

33. generation

34. soil

35. fertilizer

36. global warming

37. global greenhouse gases

38. greenhouse effect

39. atmosphere

40. emission

41. sustainable

42. climate change

43. transportation

44. vehicle

45. source

46. origin

47. resources

48. substitute

49. storage

50. greenie

51. environmentalist

52. green

这些单词涵盖了环保的基本概念、实验、动物权利、临床研究、环境保护措施、环境问题、生态系统的保护、气候变化、资源管理等多个方面。建议考生在复习高考英语时，重点记忆这些与环保相关的词汇，以便在考试中能够准确理解和运用。