Around 12 million people visit Wales' national parks each year, spending around one billion pounds in the process, according to a new report out today.
The 'Valuing Wales' National Parks' report found that 50 of our most visited attractions are in national parks, and concludes they have a huge impact upon the economy and the lives of people in Wales.
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In today's Newsweek Wales, Carl talks to Dr David Bailey from The BMA about how to ease the pressure on the Welsh NHS.
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More than half a million people are expected to take part in this weekend's 'Big Garden Birdwatch', organised by the RSPB.