What human activities have change earth

Releasing more carbondioxide

methane and nitrous oxide have caused much of the observed increase in Earth's temperatures over the past 50 years.

Explanation:

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Almost all the human activities affect the earth and contribute to change. These changes can either be for the betterment or the worse. Activities like avoiding pollution, planting trees, less use of automobile vehicles lead to a positive change on the earth. While there are also some other activities such as dumping waste, tons of factories and industries which have a negative impact on the nature.

all eukaryotic cell have mitochondria : )