Mathilda, 15, is Turkana, a native people that has survived by raising cattle in a semiarid region. Mathilda's school, like most schools in the area, doesn't have access to clean water and sanitation facilities for its students. So instead of spending their whole school day learning, Mathilda and her classmates start their day by spending two hours to the closest river fetching water—water that is anyway most likely not safe to drink. They do the same thing again in the afternoon, so they often lose around half of their school day fetching water.

Mathilda has to do the same thing outside of school hours to get the water her family needs at home, leaving her little time for studying. Because of rising temperatures, water has become harder and harder to find here, and people have to spend more and more time trying to find it.

This is just one small example of how climate change is making it harder to realise people's rights to water, education and security. Unfortunately, most higher-income countries remained silent on the issue.

This shows that communities already facing marginalization, such as women and children, mostly suffer from climate change. This is especially the case for those in countries with limited resources and fragile ecosystems.

Meanwhile, women consist of the majority of the world's poor, and so are more dependent for their livelihood on natural resources that are threatened by climate change. And around the world, women and girls are the most likely to be responsible for fetching water for their families.

This exposes them to danger and leaves them with less time to attend school, earn money, or simply to rest. But the fact is that the effects of climate change will be felt globally.

Despite the difficulties she is facing, trying to get an education, Mathilda says she hopes to serve her community in a leadership role when she grows up.

“All of the world's leaders need to work together to solve this problem that we are all facing,” she said.

Global warming always reminds us of rising sea levels and extreme weather, but it may actually bring other less obvious, long-term changes. How might they influence our lives in the future? Let’s take a look.

Making food less nutritious

The more serious global warming is, the more greenhouse gases the atmosphere contains. According to Science Advances, foods are found to contain low levels of key nutrition when they’re exposed to high levels of greenhouse gases. “If we do nothing, there is potential for negative impacts on human health,” US health researcher Kristie Ebi told the Washington Post.

Ending racial differences

With rising temperatures, more lands in the world will turn into deserts. Many people will be forced to leave their homelands and live elsewhere. In turn, this could mean that the appearance of people could become more similar. “In just 125 years, there may be far fewer people with really dark skin or pale skin,” US biologist Scott Solomon told the Daily Mail. “More and more people will have olive and brown-colored complexions (肤色).” More importantly, this could mean racism may become a thing of the past.

Making insects hungrier

Human beings or other mammals can keep a stable body temperature, while insects usually adapt their body temperature based on the environment. According to Science Daily, insects will become hungrier and need more food in warmer surroundings. That’s because a higher body temperature can increase insects’ metabolism (新陈代谢). “In addition, warmer temperatures will increase the reproductive rates of insects,” Curtis Deutsch, a professor at Washington University in the US, told Science Daily.

Helping scientists find historic sites

Due to global warming, the UK experienced an extremely hot and dry summer last year. As a result, many grassy areas in the country turned yellow or even dried out completely. Because of this, many unusual and interesting patterns hidden in some of these areas were exposed. After studying some of these patterns, scientists found Neolithic (新石器时代的) monuments and a Roman farm, which are believed to date back to around 5,000 years ago.

A tiny clue found in ancient deposits has unlocked big secrets about Greenland’s past and future climate. Just beyond the northwest edge of the vast Greenland Ice Sheet, researchers have discovered lake mud that have survived the last ice age. The mud, and remains of common flies in it, record two interglacial periods（间冰期）in northwest Greenland.

Although researchers have long known these two periods—the early Holocene and Last Interglacial—experienced warming in the Arctic, the mix of fly species shows that Greenland was even warmer than previously thought. “As far as we know, it has never been found in Greenland. We think this is the first time anyone has reported it in ancient deposits or modern lakes there,” Axford said. “We were really surprised to see how far north it migrated (迁徙).”

This new information could help researchers better measure Greenland’s sensitivity to warming, by testing and improving models of climate and ice sheet behaviour. Those models could then improve predictions of how Greenland’s ice sheet might respond to man-made global warming. After all, Greenland covers 80 per cent of the Arctic country and holds enough ice to equal 20 feet of global sea level. “Northwest Greenland might feel really remote, but what happens to that ice sheet is going to matter to everyone in every coastal city around the world,” said Yarrow Axford, an associate professor in the team. “One of the big uncertainties in climate science is how fast the Earth changes when it gets warmer. Geology gives us an opportunity to see what happened when the Earth was warmer than today,” said Axford.

People might be surprised to see how today’s Greenland looked during the last two interglacial periods. During the Last Interglacial, global sea levels increased by 15 to 30 feet, largely due to thinning of Greenland and Antarctica’s ice sheets. However, now researchers believe northern Greenland’s ice sheet experienced stronger warming than previously thought, which could mean that Greenland is more responsible for that sea-level rise.

Finding lake deposits older than about 10,000 years, however, has been historically very difficult in Greenland. To measure these ancient temperatures, researchers look to ice cores (冰核) and lake deposits. Since ice and lake deposits form by a gradual buildup on annual layers of snow or mud, these cores contain history of the past. By looking through the layers, researchers can obtain climate clues from centuries ago.