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The ocean is under increasing pressure. Everyday human activities, from shipping to oil and gas exploration to urban pollution, are affecting the marine environment. Extensive research shows how this combination of stressors represents one of the greatest threats to marine wildlife, potentially affecting biodiversity on a global scale.

When people think about agricultural pollution, they often picture what is easy to see: fertilizer spreaders crossing fields or muddy runoff after a heavy storm. However, a much more significant threat is quietly and invisibly building in the ground.

Every day, we publish a selection of your emails in our newsletter. We’d love to hear from you, you can email us at yoursay@theconversation.edu.au.

In ancient Egypt, what was the Sphinx all about? – Effie, age 8, New Plymouth, New Zealand.

With a general election looming, the largest shake-up of New Zealand’s local government system in three decades sits on the table.

Starting school is a big moment in a child’s life. It is a time filled with new routines, new people and new places. These changes can also mean it is sometimes a stressful time. But it doesn’t have to be.

It happens in slow motion. Your six-year-old daughter is sprinting across the playground at school drop-off time when her toe catches on uneven ground. She goes down hard.

Few people globally have influenced business, sport, the environment and philanthropy like Patagonia founder Yvon Chouinard.

All of us, sooner or later, will need to make a decision about the final resting place for ourselves or a loved one.

In early 20th century Australia, Indigenous people were denied citizenship and the nation had a racially exclusive immigration policy. Most people not only accepted the “White Australia” policy but openly identified with its assumption of white supremacy. Popular culture was replete with overtly racist terms and images.

Australians are deeply divided over whether January 26 is an appropriate day to celebrate Australia Day – and we are no longer debating it as much as doubling down in entrenched camps.