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Top 10 jobs that could change the world

Top 10 jobs that could change the worldWant to make an impact on the world? Read on for our guide to 10 jobs that can help you change things for the better.

1: Ecologist

Ecologists study the relationships between animals, plants, people and their physical surroundings.

What qualifications do I need?

The minimum qualification is usually a first degree in a biological or environmental subject such as ecology, conservation biology, environmental biology, environmental management or marine biology. Many employers look for postgraduate qualifications. Experience as a research assistant or a conservation project volunteer may also be advantageous.

How much does it pay?

Salaries may range from around £13,000 to £45,000 or more a year.

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2: Hydrologist

Hydrologists monitor, manage and conserve the earth's freshwater resources. They also monitor and analyse rainfall.

What qualifications do I need?

Most hydrologists hold a degree in a relevant subject, such as geography, environmental science, civil engineering or mathematics. The diploma in environmental and land-based studies may be relevant. Most hydrologists also have a postgraduate qualification.

How much does it pay?

Salaries range from about £15,000 to £45,000 a year.

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3: Immunologist

Immunologists study the body's immune system and how it works in combating disease. They use this knowledge to treat and control a range of diseases and disorders, such as allergies, cancer and AIDS.

What qualifications do I need?

Doctors specialising in immunology will have completed a medical degree and specialist training. Many other immunology posts require a degree in immunology or a related subject such as medical microbiology, genetics or biomedical science. Some jobs, especially those based in universities, need a postgraduate qualification, such as an MSc or PhD.

How much does it pay?

Salaries range from at least £20,225 for a newly appointed biomedical scientist up to a maximum of £173,638 for a consultant immunologist.

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4: Marine biologist

Marine biologists study the plants and animals that live in the world's oceans. Their studies help us predict how marine ecosystems will cope with changes such as global warming, pollution, pressure from fisheries and tourism in sensitive areas.

What qualifications do I need?

Entrants for research posts need a relevant degree and usually a postgraduate qualification. Some entrants take a degree in marine biology or oceanography, although it is not essential to study these subjects.

It is possible to do a degree in any of the biological sciences and then go on to specialise in marine biology with a masters or PhD.

How much does it pay?

Salaries may range from about £17,000 to £60,000 a year.

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5: Oceanographer

Oceanographers are scientists who study the relationship between seawater, fresh water, the polar ice caps and the atmosphere. Their research can influence industrial processes and government policy.

What qualifications do I need?

Entrants usually have a first degree in physics, chemistry, maths or biology, followed by a postgraduate degree in oceanography.

For a first degree, applicants usually need five GCSEs (A*-C), or equivalent qualifications and at least three A-levels, preferably including maths and science subjects. Entry to a masters degree course is usually with a first degree in a science discipline.

Almost all vacancies require a masters degree and, increasingly, employers are now looking for a PhD.

How much does it pay?

Salaries may range from around £18,000 a year to around £60,000 a year.

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Read about 5 more jobs that could change the world