Contradicting a 2006 study by Swedish researchers, the new report claims that, judging by the evidence, either tumors take more than a decade to appear following cell phone usage, or that there is no link:

Radio frequency electromagnetic fields emitted from mobile phones have been proposed as a risk factor for brain tumours; however, a biological mechanism that could explain the potential effect of radio frequency electromagnetic fields in the risk of brain tumours has not been identified... The lack of a detectable trend change in incidence rates up to 2003 suggests that [either] the induction period for brain tumours associated with mobile phone use exceeds five to 10 years, the increased risk of brain tumours associated with mobile phone use in this population is too small to be observed, the risk is restricted to subgroups of brain tumors or mobile phone users, or that there is no increased risk associated with mobile phone use.

Of course, this could just mean that we all have tumors waiting to appear in the future, so don't break out the celebratory minutes just yet.

No cancer risk from increased mobile phone use [Guardian.co.uk]

The Sun is obviously the biggest reason we're alive today — without it Earth would be a lifeless, frozen lump of rock at best. The same is probably true of the oceans, Earth's distance from the Sun, and so on. But Earth's magnetic field doesn't get enough credit (apart from a few terrible movies like "The Core") as being just as important as any of those ingredients for keeping life on Earth. Without it, highly energetic particles from the Sun would fry life, shatter life-giving molecules floating in the air and water, and strip away most of our atmosphere (witness Mars, whose thin atmosphere has been ravaged by solar winds).

In just a few centuries that may be a reality. Even if the field doesn't disappear entirely, in a weakened state it could let enough radiation in to cook the vast communications networks and power girds that have sprung up around the planet in the last century. But searching through ancient copper mines in Israel and Jordan has turned up some interesting new evidence. By looking at layers of metal slag that aligned themselves based on the magnetic field that was present as they cooled thousands of years ago, scientists at Scripps Institute of Oceanography and UC San Diego have managed to reconstruct the field's strength. What they found was startling: about 2,000 years ago Earth's magnetic field peaked in strength, and it's been weakening ever since.

The field itself isn't going away any time soon — it's powered by oceans of molten metal churning at the center of the planet — but for reasons we don't quite understand, every quarter million years or so it reverses polarity. Each time it does this, there's a period of a few days to a few hundred years where the field becomes so weak that it's almost non-existent, and that's what we seem to be heading for.

What does this mean for life on Earth? Bottom line is we don't know. Some scientists have argued that mass extinctions line up with field reversals in Earth's past, while others say that when the field flips it flips too fast — maybe over the course of a week or less — to do anything more than cause a glitch in your cell phone reception.
The one thing we can take comfort in is that the decline has so far been slow and steady, so humans alive today probably won't have to worry much.

But our fuzzy understanding from the geologic past suggests that as the field weakens further, it's polarity can wander all over the place, flopping back and forth like a fish out of water. If that's true, in a couple of generations global warming from CO2 in the atmosphere might be the least of our worries.

Source: Scripps Institute of Oceanography

In case you can't read the small print, here's the money shot:

Today's telephone system, solid state devices, miniaturization, and the new science of space rocketry and communication will be melded together so that no one wearing his telephone can ever become lost in the woods.