Why can't time be altered to prevent Global Climate changes?

Theoretically I suppose you could do this but there would NEVER be enough agreement among all interested parties to allow this to actually happen.

Besides, if Global Climate changes doesn't thin out the populations of humans on earth through infinite "Acts of God" then life will cease to exist on earth anyway.

So, it's sort of a damned if you do and damned if you don't kind of scenario.

The end result likely is we are going to witness a whole lot of people dying from Global Climate changes at least the next 300 years or more.

However, from my point of view this is still better than something like World war II was used also to thin out world populations.

If you lived through the 1950s like I did most people were pretty crazy from PTSD from the Great Depression and World WAr II until the Viet Nam War. By then most of the craziest people had died or had killed themselves or their families or were in prison or mental institutions from World war II and the Great Depression.

So, because of all this and much more I don't see Time Travel being used to reduce world populations directly to prevent human extinction. Also, we are also in the 6th great extinction the last few hundred years too.

Also, here's more regarding the 6th Great Extinction:

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The Sixth Great Extinction, or Holocene extinction, is the ongoing, human-caused event where species are disappearing at an accelerated rate due to activities like habitat destruction, climate change, and pollution. Unlike the five previous mass extinctions caused by natural events, this one is a direct result of human actions, threatening biodiversity globally and impacting ecosystems on a large scale. Evidence indicates extinction rates have risen drastically, and many scientists believe we are either entering or already in the midst of this devastating event. 

What is it?

• An ongoing crisis:

  The Holocene extinction refers to the rapid loss of species occurring during the Holocene epoch. 

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What causes it?

Habitat destruction and degradation:
Unsustainable land and water use, particularly for agriculture, leads to the destruction of natural habitats and the degradation of vital ecosystems like coral reefs and rainforests. 

Climate change:

The burning of fossil fuels releases greenhouse gases, causing rising atmospheric temperatures and exacerbating environmental stresses like droughts and floods that make habitats inhospitable. 

Pollution:

The release of pollutants into air, soil, and water systems disrupts ecosystems and harms wildlife. 

Why is it significant?

Accelerated extinction rates:
Current extinction rates are far higher than the natural "background" rate observed in the fossil record. 

Global impact:

The crisis affects numerous species across terrestrial and marine environments, including mammals, birds, amphibians, fish, and invertebrates. 

Irreversible consequences:

If allowed to continue, this event could take millions of years for life to recover, with potential severe consequences for human society as well. 

What is the evidence? 

Observed declines:
Scientists track species losses, such as the documented disappearance of the Panamanian golden frog, the extinction of the passenger pigeon, and the massive decline of certain amphibian populations.
Scientific monitoring:
Geologists, botanists, and marine biologists around the world are studying these changes, gathering evidence to document and understand the ongoing extinctions.

• Holocene extinction - Wikipedia

  The Holocene extinction, also referred to as the Anthropocene extinction or the sixth mass extinction, is an ongoing extinction ev...

  

  Wikipedia, the free encyclopedia

World Wildlife Fund

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Human-driven:

Unlike previous extinctions, which were caused by natural catastrophes like asteroid impacts, this event is primarily driven by human activities. 

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