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The Antarctic Icecap is the largest supply of fresh water, nearly 2 % of the world’s total of fresh and salt water. As can be seen from the table below, the amount of water in our atmosphere is over ten times as large as the water in all the rivers taken together. The fresh water actually available for human use in lakes and rivers and the accessible ground water amounts to only about one third of one percent of the world’s total water supply.

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【推荐1】Experts are predicting that many roles that can be performed by artificial intelligence(AI) are at risk of stepping off the history stage. But some will experience some of the fastest growth rates in the next 10 years.

Personal care aide

Median annual salary: $24,020

Education: High school diploma

Job description:

Personal care aides work with people who have disabilities, cognitive disorder or chronic illness. They help them with daily personal tasks and activities, including bathing, dressing, household chores, shopping and preparing meals, etc., but are limited to non-medical care.

School psychologist

Median annual salary: $76,990

Education: Graduate degree in school psychology

Job description:

School psychologists specialize in working with students from elementary up to high school. They diagnose and treat learning disabilities, mental health issues as well as cognitive, behavioral and emotional problens. If necessary, they will refer them to other mental health providers.

Veterinarian

Median annual salary: $80,830

Education: Doctorate degree in veterinary medicine

Job description:

Veterinarians examine, diagnose and treat animals. The diagnostic tools they use, and the treatments they provide are often similar to those used for humans.

Vets' work may include treating pets or companion animals, working with livestock, or working as food safety and inspection vets in zoos.

Information security analyst

Median annual salary: $98,350

Education: Bachelor's degree in a computer-related field

Job description:

Information security analysts design and perform security measures to protect an organization's computer systems and network. They constantly monitor a computer network for security breaches and develop security standards. They also help create a disaster recovery plan for an emergency situation.

【推荐3】The World’s Four Large Nature Reserves (保护区)

●Ross Sea Marine Reserve

Built in October 2016, the Ross Sea in Antarctica is home to the world’s largest marine reserve, covering 598,000 square miles in the Southern Ocean. The Ross Sea hasn’t been harmed by humans or damaged by overfishing or pollution. However, the rising demand for seafood and the low cost of fuel may encourage some fishermen to brave the journey.

●South Georgia Marine Protected Area

The South Georgia and the South Sandwich Islands are about 800 miles southeast of the Falkland Islands in the South Atlantic Ocean. Over half of South Georgia Island is ice covered, so there’re no people who are always living here. But the area is a rich environment that supports major populations of seabirds and marine mammals including globally threatened species.

●Greenland National Park

Greenland National Park, in the northeast of the Arctic country, isn’t a traditional national park. The only people who arrive here are those hunters from the nearby town of Ittoqqortoormiit. There live different animals such as polar bears, caribou, musk oxen or foxes.

●Chagos Marine Protected Area

The Chagos Archipelago is a group of seven atolls (环礁) which form 55 small islands in the Indian Ocean about 310 miles south of the Maldives. The 397,678-square-mile area was made to be a marine re serve in 2010 because it contains the world’s largest coral atoll, along with some of the planet’s cleanest water. It also supports different kinds of sharks—shortfin mako, blue, ocean whitetip and whale sharks.