Let me get this straight - they're debating the environmental impact when the track is pretty much right next door to an airport? 
I know that sounds crazy but the airport is part of the problem. It's the safety isuues. GP radio masts will interfere with holiday jets going over. Also on GP weekend Silverstone becomes the busiest airport in the world, so there could be traffic control problems.Anyway whatever they decide they will take ages and come up with obscure reasons for things and wierd decisions...thats British planners!!
Yep, that's a large problem, i suspect some radio usage agreement can be developed with the airport, it's probably in both their interests given the fact that EMA will probably have one of it's busiest periods when the F1 (hopefully) comes to town, and the airport will surely see this as a great opportunity to market themselves as an efficient airport...... As for the F1 helicopter traffic, those guys can drive like everyone else, it's not going to kill them. They can experience the horror of morning traffic on the A453!! 
The thing that got me was that they reckon they have to consider the 'air quality and noise levels', something that can't be made much worse by a few cars racing one weekend a year. Even the noise created by developing the new paddock etc will be drowned out by a plane taking off nearby...
I agree with you about air pollution and noise levels, but the airport is a big issue. East Midlands is a decent-sized airport, but it couldn't suddenly become one of the busiest airports in the world without some planning. For aircraft to land and/or take off, they need to fly right over the track. If there are helicopters etc. flying around, this could be very dangerous. There is also the "3,000ft Rule", which means that an aircraft have to keep a 3,000ft distance between open-air gatherings (more than 1,000 people), although permission can be sought from the CAA to enter that airspace. A year or two ago new Public Safety Zones were devised and they basically state that nothing can be built which is used for people staying there for a reasonable amount of time. This includes houses and sports stadia, and as Donington is right next to the airport, this is bound to cause them difficulties in getting planning permission. I know this for a fact because it means my football club back in Belfast cannot renovate its stadium because it is very close to the airport. Linked to this is what happens if a plane crashes? If a plane takes off using East Midlands' westerly runway and something goes wrong, it will almost certainly crash into the circuit. If this happens, it will be an horrific situation. Unless some brown envelopes are changing hands, Donington's chances of getting planning permission are not as certain as they think based on its proximity to the airport. This and other things suggest - and I don't like being a pessimist - that its more likely that there won't be a British Grand Prix in 2010.

Ayrton Senna: WDC 1988,
1989, 1990, 1991
McLaren: WCC 1974, 1984, 1985, 1988, 1989, 1990, 1991, 1998,
1999, 2007McLaren: WDC 1974, 1976, 1984, 1985, 1986, 1988, 1989, 1990, 1991, 1998, 1999, 2008