Yes and it can cause headaches, cancer, and other health problems such as breathing and such!
Very and it is linked to several types of cancers
Yes, if sewer gas is coming into your home from a backed up drain it can be very harmful to a baby and everyone else inside the home. It can cause hydrogen sulfide poisoning and asphyxiation.
Most likely a drain has dried out and there is no water in the trap to stop the gas from coming up. Sink, shower, or main floor drain.
sewer gas. either your trap has run dry from lack of use or is improperly or not vented causing your line to syphone. this will cause the water in the p-trap to syphone out allowing the sewer gas to ecsape.
It is the shape of the drain. Lay a P down with the curve down and that is the basic shape of the drain. This keeps water in the loop if the P to make a seal against sewer gas coming back up.
It is probably sewer gas or something coming up from the drain.
You could do that but you would need a trap to stop sewer gas from coming in. The toilet has the trap integrated into it. If you have access to underneath then you could add one.
One of the biggest culprits I have found for sewer gas smell is the floor drain many floor drains are seldom if ever used and if unused long enough the water in the trap will evaporate allowing sewer gas to enter the dwelling. this also applies to any trap which is not used regularly.
Is there a floor drain or any other drain nearby that is not used often? Sometimes the p-trap in a drain will dry out and allow sewer gas to escape. The smell becomes more intense when hot water goes down the drain.
Could be caused by a couple of things. If you have an onsite septic system (tank and drain field) the tank may be full, and the rainwater is causing it's contents to backup the main drain back in to the house. A vent pipe could be plugged, which causes the sewer gas to back up. If you are hooked to a public sewer, there may be a blockage in the main drain out to the line in the street. Have a plumbing contractor check it out. It can be very dangerous.
Heck no as it is a very carcinogenic mixture
check or have a plumber check p trap in drain line under shower. if leaking [losing water] it wont stop sewer gas from coming up the drain. probably the most likely cause.
easily unattach the hose coming from the tank leading to the carburetor turn the gas ''on'' and drain and then turn to "reserve" and drain the rest of the gas.