human activities make the life of the people a lot easier and  faster to do something but on the other side it could cause some serious problems to our earth  but people don't have better option to do something better than the"human activities" to make our lives easier. i personally think that human activities  are  harming our earth for the following.
scientists say that human activities are causing global warming to our earth and the main reason is gasses . for example when the human started bringing fuel , inventing technology like nuclear missiles that include a lot of different gasses inside them and when the all the gasses mixes in the air it starts causing global warming. the other warning is the decrement of the water , if people were more intelligent and know how to save water there would be less problems and there is a very similar example of this : The Aral Sea, located on the Uzbekistan-Kazakhstan border, was once the fourth largest lake, but has now shrunk by 75 percent. The Aral Sea was once fed by two major rivers which now, due to human activity.Another reason is plastic productions , people invented a material, called plastics, that were previously unknown to the planet. Many of these new materials are made up of chemical compounds that can remain active in the environment for thousands of years. Today, the world produces approximately 300 million tons of plastics each year. About 20-40 percent of that ends up in landfills, and another 10-20 million tons makes it way to the oceans, disrupting sea life. According to the World Watch Institute, “a recent study conservatively estimated that 5.25 trillion plastic particles weighing a total of 268,940 tons are currently floating in the world’s oceans.” and that is a very huge amount of dangerous material in the oceans which will cause serious problem in the future.

if people continue doing worse human activities the world would be in danger but on the other hand if human activities were not excisted the population would increased by huge amount and the world would be in danger too because the human activities will cause people die earlier.