Is it true the Earth will one day be uninhabitable?

Yes, and possibly fly off into deep space. There are many scenarios.

We as humans, may poison the planet as nuclear, biotoxin, human effects on climate change. Supervolcano Yellowstone in a major eruption would cause so much ash that world goes into a winter for years and USA decimated. You can look up its effects in created videos on Youtube. Solar flare or solar ejection in our direction could at least cause havoc in communication and utilities, but can get even worse, as could a collision from an asteroid. The first definite affect is not for billions of years. The Earth slowly cools and the molten iron core solidifies negating the magnetism that shields us from solar winds. The atmosphere is basically blown away and Earth's surface becomes barren and oxygen gone. The auroras near the poles show the solar winds and magnetic shielding at its weakest spots. Also, the sun is expending its fuel as a nuclear fusion reactor and eventually becomes a red giant that makes this planet uninhabitable for various reasons of orbit shift, frying, or just shoots off into space. Again, billions of years away.

We can fix the human effects, and Yellowstone will blow when ready either tomorrow or 100,000 years or more. The key is how the fragility of the planet relates to what religions tell you. Though not for very many years, did a deity create a system with an eventual destruction? This is something to be aware of what humans do and always live to enjoy life and be tolerant and loving about people where skin color, sexual preferences or beliefs, religion etc, have no effect that we are all in this together and are more alike than you think. The Earth and Sun we know will be gone one day so isn't it petty to be annoyed about whether someone smokes marijuana?  

Not to worry...the projections for the "best answer" are right...more or less, BUT...

For the past 70 plus years we have reverse engineered alien spacecraft and technologies and we can travel to any point in our solar system, as well as OTHER SOLAR SYSTEMS.www. siriusdisclosure .com (remove spaces) and/or Sirius Disclosure YouTube channelThe government won't go through the process for full disclosure. They are too lazy to "manage the change". That is a quote.The aliens are already here. They are NOT hostile. If they were…we would be DEAD.

Eventually it will. The sun is expected to be in the middle of its life and we are losing species for many reasons, including logging. We will also eventually run out of water and everyone will die of thirst. So eventually, it will be true.

theres no way of knowing that but that wouldnt surprise me

The luminosity of the Sun will steadily increase, resulting in a rise in the solar radiation reaching the Earth. This will result in a higher rate of weathering of silicate minerals, which will cause a decrease in the level of carbon dioxide in the atmosphere. In about 600 million years from now, the level of carbon dioxide will fall below the level needed to sustain C3 carbon fixation photosynthesis used by trees. Some plants use the C4 carbon fixation method, allowing them to persist at carbon dioxide concentrations as low as 10 parts per million. However, the long-term trend is for plant life to die off altogether. The extinction of plants will be the demise of almost all animal life, since plants are the base of the food chain on Earth.[12]

In about one billion years, the solar luminosity will be 10% higher than at present. This will cause the atmosphere to become a "moist greenhouse", resulting in a runaway evaporation of the oceans. As a likely consequence, plate tectonics will come to an end, and with them the entire carbon cycle.[13] Following this event, in about 2–3 billion years, the planet's magnetic dynamo may cease, causing the magnetosphere to decay and leading to an accelerated loss of volatiles from the outer atmosphere. Four billion years from now, the increase in the Earth's surface temperature will cause a runaway greenhouse effect, heating the surface enough to melt it. By that point, all life on the Earth will be extinct.[14][15] The most probable fate of the planet is absorption by the Sun in about 7.5 billion years, after the star has entered the red giant phase and expanded beyond the planet's current orbit.

yeah.... for you!

Yes, we can't store nuclear waste forever

All things must come to an end.

No, I don't think so, I think that counselling will happen with the sources in power and it will continue lovingly without caring.

It already had been