problems that cause great danger to the sea 求英文的分条

网友回答

1.Unsustainable fishing
　　76% of the world's fisheriesare already fully exploited or overfished,while billions of unwanted fish and other animals die needlessly each year.Unsustainable fishing is the largest threat to ocean life and habitats ...not to mention the livelihoods and food security of over a billion people.
　　2.Inadequate protection
　　They might cover over 70% of our planet’s surface,but only a tiny fraction of the oceans has been protected:just 0.6%.Even worse,the vast majority of the world’s few marine parks and reserves are protected in name only.Without more and better managed Marine Protected Areas,the future of the ocean’s rich biodiversity - and the local economies it supports - remains uncertain.
　　3.Tourism & development
　　The beach is not just a favourite holiday destination,it’s our favourite place to live.Around the world,coastlines have been steadily turned into new housing and tourist developments,and many beaches all but disappear under flocks of holiday-makers each year.This intense human presence is taking its toll on marine life
　　4.Shipping
　　The oceans are huge highways,across which we ship all kinds of goods.Like other human activities,this heavy traffic is leaving its mark:oil spills,ship groundings,anchor damage,and the dumping of rubbish,ballast water,and oily waste are endangering marine habitats around the world.
　　5.Oil & gas
　　Important reserves of oil,gas,and minerals lie deep beneath the seafloor.However,prospecting and drilling for these poses a major threat to sensitive marine habitats and species.
　　Pollution
　　6.Pollution
　　Untreated sewage,garbage,fertilizers,pesticides,industrial chemicals ...most of the pollutants on land eventually make their way into the ocean,either deliberately dumped there or entering from water run-off and the atmosphere.Not surprisingly,this pollution is harming the entire marine food chain - all the way up to humans.
　　6.Aquaculture
　　Fish farming is often touted as the answer to declining wild fish stocks.But more often than not,the farming of fish and shellfish is actually harming wild fish,through the pollution the farms discharge,escaped farmed fish,increased parasite loads,and the need to catch wild fish as feed.
　　7.Climate change
　　Coral bleaching,rising sea levels,changing species distributions - global warming and climate change are already having a marked affect on the oceans.Strategies