Global warming - an urgent problem requiring radical solution (no politics or religion)

We absolutely have the technology, to have 100% renewable, environmentally benign, electricity generation.

I didn't mean just the climate change issues. I meant literally any and all planetary problems. In fact given that our radio transmissions already have made it to and beyond alot of the closest stars by now, the lack of any response or aliens coming to visit Earth, indicates that likely no intelligent species within 100 light years of Earth has developed interstellar travel, otherwise where are they??

Our transmissions would be absurdly weak at that distance. We could not detect such transmissions from Alpha Centauri.

You need to watch The Three Body Problem (it's on Netflix).

I don’t see how EE’s proposal benefits the arts. /jk

If they have more advanced tech they might still be able to detect it. They could also just be flying around with half a light year of the solar system and pick them up in our spacecraft. Basically we need to start making noise in space and catch some attention, as that's the only likely way Earth is gonna be saved. Stop all the dumb moon missions and put 100% of the resources and effort into making more powerful interstellar communication systems.

You can't make a low signal to noise ratio high with technology. Once the noise level is high enough, the information is lost.

A problem is that the Sun is a powerful source of radio ways. Only an intermittent problem on Earth because we are near the transmissions we need to receive. But 4 light years away, the emissions of the Sun make the radio emissions of the Earth insignificant.

Take the Voyager 1 probe for example, but imagine the entire machine was a transceiver and nothing else. It could continuously try to contact other planets as it gets further and further away from the suns interference. Heck we should have sent a sequence of probes one after the other into deep space a few AU away from each other and form a type of continuous comm link to better propagate signals.

You are right that certain types of communication, if aimed at a fairly nearby star, could be made out against the background noise of the Sun. The reason is a combination of:

1. Powerful transmitter
2. Narrow range of frequencies
3. Narrow beam
4. Encoding (such as pulse encoding) that is very different to thermal noise

These combine to produce a signal that could be detected despite a Sun that emits billions of times more radio energy than all human emissions put together.

NASA deep space network transmissions are one of the best, because the design has to meet a similar objective.

Surprisingly, despite most of the radio transmissions on Earth being mobile phone transmissions, these would be essentially indetectible, because they use a wide range of frequencies and the very large number of transmitters look much more like noise when added.

Should weak prey animals advertise their existence , and location?

Why are we assuming that these technologically superior aliens would still be using radio waves for communication and hadn't developed something better? Then they wouldn't be monitoring radio waves from distant stars searching for communication from intelligent life, nor would we be able to detect any communication from them.

Why do you assume that intelligent life on nearby stars would have developed on a timeline similar to ours? They might have visited Earth 100,000,000 years ago, found nothing of interest, and have gone extinct in the interim.

The odds that an extraterrestrial civilization within reasonable distance to receive intelligible radio signals from Earth exist at a level of technology close enough to ours that we would find each other through radio signals are very slim.

Well if they're more advanced than they can obviously detect radio waves, those are the most basic form of energy transmissions out there lol. But with everything else I agree, which is why I think this whole UAP disclosure thing is the new biggest fabricated scam of the 21st century. The odds are so low that both a habitable planet, that developed life, and then evolved intelligent life, that became space faring, all within roughly the same few thousand years of Earth (microscopic on such time scales) happened on a planet within 50 or even 100 light years of Earth. The corrupt government just needs a new distraction after the Iran war didn't work do now they're hyping up all these crappy/artificially made "UFO footage" to the public to make it look like they're hiding more interesting things. It ain't gonna work. Heck even those stupid "Buga Spheres" ended up being debunked with a little hidden Hydrazine thrust system, all lame man made toys LOL.

Meanwhile here on earth......

That just reminded me of my 0-emission zip line transportation system proposal in crowded cities. NYC many people work in Manhattan and live in Brooklyn. There should be ziplines that start at the tops of the taller buildings and cross the East River and land at either ground level or on top of the heavily populated apartment complexes in Brooklyn. You could even have sequential ziplines for longer distances where you get off at the bottom, climb 10 flights or or a huge ladder, get on the next one..etc (great combo of exercise and riding), I bet people could travel dozens of miles that way without a vehicle! Would relieve so much car congestion in the city as well as some train jam-packing as well! Who needs Zipcars when you have Ziplines?? NYC tech bros are just dumb when they don't think of these suggestions smh 🙄