all right. we know driving while texting or talking on a cell phone is a dangerous combination. bad idea. it s been confirmed by study after study. they say it s the conversation, the distraction mentally, not just the physical stuff. we do stories all the time about accidents that happen. very, very dangerous. is there really any way to change behavior? abc s lisa stark has our exclusive report and a new study that shows the answer is yes. reporter: the evidence is clear. many of us are driven to distraction. where is this driver looking? not on the road ahead. she was texting. and this trucker? cell phone in one hand, suddenly he s careening across four lanes and rolling over. you re being stopped because of your cell phoho use. reporter: what would happen if police cracked down on distracted drivers? to find out, the department of transportation helped pay for r enforcement programs in hartford, connecticut, and
30. but anything over 50 doesn t mean much. consumer reports tested a few dozen sunscreens and found nine they recommend. including banana boat sport performance, coppertone sport ultra and cvs fast cover. why not sit in the sun as long as you put good sunscreen on? there is no complete sun block there s no such thing as a sun block. the new regulations have eliminated the word sun block. sunscreen is part of an armament that we have, seeking shade, wearing protective clothing, sunglasses that help minimize sun damage. and skin cancer. reporter: but, what about the sprays that have become so popular? spray on more than you think you need. let it dry. spray it on again. don t breathe it in. it is always a good idea to cover up. hat and shirt, preferable. lisa stark, abc news, washington. some other points. some people think you need to spend money to get the best sunscreen.
sometimes i feel like i might get a sunburn from the lights. that s not possible, right? i hope not. now to a story that has sparked conversation as summer approaches. talking about the new fda regulations regarding sun block. trying to clear up misconceptions. while they are aimed to protect us against exposure, they don t go into effect until next summer. what do we need to know this summer? lisa stark broke it down. reporter: the hot sun gives off harmful uvb and uva rays. uva rays can penetrate the skin and do a lot of hidden damage. take a look at this demonstration on a san diego beach. a dermatologist takes a regular polaroid picture of a volunteer. then takes one using ultraviolet right. it shows damage under the skin. oh, my gosh. that s pretty bad. all of these little dark spots you see here, those are markers of sun damage.
it s just 20% contained. seems like we have heard this one before, volcano ash forces flight cancellations. well this time the volcano is in chile and it s been erupting for 11 days. the ash drifted all the way to australia and new zealand, disrupting flights there. 70,000 passengers have been affected. ash clouds could cause problems at least for a week. now to medical news. the government is taking aim at one of the deadliest forms of skin cancer, melanoma, kills one person every hour. so the fda has now new regulations for sunscreens to help people protect themselves. lisa stark has the details. reporter: all these years we have been slathering on the sunscreen. with all those confusing labels. spf 15, spf 50, waterproof. water resistant. we have been thinking we are protecting ourselves. and more importantly our children. people were getting a false sense of security with sunscreens the way they were. reporter: a troubling thing has happened. despite the explosion of sale
back, subjecting them to uvb and uva light. some protected well, some did not. starting next summer sunscreen must have an spf of at least 15 and offer protection against both uvb and uva rays to claim it helps prevent cancer and aging. once more, sunscreen makers will no longer be able to claim their products are waterproof or sweatproof. there is no such thing. no matter what sunscreen you use, you have to use a lot for it to work. an adult needs an ounce, the size of this golf ball or what is in the shot glass every two hours for it to be effective. that means if you are at the beach and have a tube of sunscreen this big, well after six hours, it should be empty. lisa stark, abc news, washington. great example. because a lot of people keep that tube. sort of use it the entire summer. you really need more. it s not cheap. but worth paying for, obviously. you think of the term sunscreen and sun block.