User Rating: 5 / 5
Over the last decade we have become increasingly alarmed at the amount of plastic in our oceans. More than 8 million tons of it ends up in the ocean every year. If we continue to pollute at this rate, there will be more plastic than fish in the ocean by 2050.
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People have relied on buried reservoirs of clean, life-giving water for thousands of years. But there are limits to how much can be sucked out of the ground before the wells run dry – or other unpredictable problems emerge.
User Rating: 5 / 5
Built in the 1950s to generate electricity, Lake Kariba in Zambia and Zimbabwe has since supported activities such as tourism, fishing and conservation.
User Rating: 5 / 5
Most people would agree that invasive plants are unwanted.
User Rating: 5 / 5
In South Africa, a water-scarce country, groundwater is a vital supply for small towns and commercial farming.
User Rating: 5 / 5
Climate change is underway, and human activities such as urbanisation, industrialisation and food production are key contributors. Food production alone accounts for around 25% of global carbon emissions. Ironically, the changing weather patterns and more frequent extreme weather events resulting from climate change also put the world’s food supplies at risk.
