Summary
Highlights
Climate change and global warming are real, ongoing phenomena. The scientific community, with at least 97% consensus, attributes this warming to anthropogenic (human) influence. Governments and citizens must act quickly to address this, as solutions implemented today will only show full effects in decades to come, impacting future generations more directly than our own.
The climate crisis is caused by an excess of greenhouse gases trapping solar radiation, preventing it from dissipating. This changes average weather patterns, threatening economies reliant on predictable seasons. Using Venus (too much greenhouse cover) and Mars (too little) as examples, Earth is currently an optimal setting that we are destabilizing. The 'hockey stick graph' demonstrates a sharp increase in global temperatures since the industrial period, correlating with rising CO2 emissions. The safe level of CO2 is 350 parts per million (PPM), but current readings are much higher (over 400 PPM), posing a significant danger.
The effects of climate change are already dangerous and catastrophic for many communities. Global sea ice is rapidly declining, with unprecedented melting in Greenland glaciers. This melting threatens freshwater supplies for hundreds of millions in South Asia and contributes to rising sea levels. Sea level rise is irreversible on human timescales, threatening coastal cities and entire island nations, leading to displacement and loss of culture. Additionally, rapid Arctic warming causes more extreme winter conditions, while warming seas intensify typhoons and other storms.
Climate change poses a severe threat to other species, many of which cannot adapt or flee quickly enough from warming temperatures. Organisms are observed moving uphill or away from the equator to escape warming, highlighting their struggle to find suitable climates. Projections show that without significant action, global temperatures could increase by up to 4.8 degrees Celsius above pre-industrial levels by 2100, far exceeding the already dangerous 2-degree threshold.