Did you know that there are a group of frogs in South America known as 'poison-dart frogs'? There are different types of frogs within the group but most of them are brightly coloured and have black spots. They are dangerous to touch because they have poison on their skin. Native people in the area used to rub the poison onto their arrows before hunting.
Cancer doctors issue warning about ozone
Cancer doctors issue warning about ozone The ozone layer exists high in the upper
atmosphere and provides a crucial shield from harmful ultra-violet
solar radiation. However, the ozone layer is at risk and, despite
declining emissions of CFCs and other ozone-depleting substances,
yearly ozone losses have increased during the 1990s. Thinning of
the ozone layer will not only affect humans; it will also affect
plant and animal life. Springtime Arctic ozone losses could
adversely affect northern plants during their growing season, which
would have effects throughout the food chain. Cancer specialists
now warn that we must actively work to prevent the increasing loss
of the ozone layer, as it will only get worse and may cause acute
suffering through heat exhaustion, increased pollution and
increases in diseases such as malaria and cancer. Although Canada
supports the reduction of greenhouses gases and the protection of
the ozone layer, not enough has yet been done to adhere to these
commitments.
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