Steeper approach?

I was talking to a 747 pilot the other day and he asked me whether the aviation industry had considered steepening the traditional three-degree glideslope approach for landing to 3.2 degrees. The benefit would be that aircraft would come down the approach using less engine power, therefore burning less fuel, with the added benefit of overflying local residents at a higher altitude. This 747 pilot reckons his aircraft can cope with 3.2 degrees with no problem. Seems like a sensible idea, so should we launch a campaign for the 3.2 degree approach?

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