Link between Cell Towers and Cancer Elusive
A quick search on cell phone towers and cancer provides many results, some state cell phone towers are dangerous because it can cause cancer, while some others state that tests regarding cell phone towers and cell phone usage are inconclusive with regards to cancer, though there are chances of increased risks in some cases.
Many scientific studies have investigated possible health symptoms of
mobile phone radiation. These studies are occasionally reviewed by
some scientific committees to assess overall risks. A 2007 assessment
published by the European Commission Scientific Committee on Emerging
and Newly Identified Health Risks (SCENIHR) concludes that the three
lines of evidence, viz. animal, in vitro, and epidemiological studies,
indicate that "exposure to RF fields is unlikely to lead to an
increase in cancer in humans".
Studies in people
Very few human studies have focused specifically on cellular phone towers and cancer risk.
In one large study, British researchers compared a group of more than 1,000 families of young children with cancer against a similar group of families of children without cancer. They found no link between a mother’s exposure to the towers during pregnancy (based on the distance from the home to the nearest tower and on the amount of energy given off by nearby towers) and the risk of early childhood cancer.
In another study, researchers compared a group of more than 2,600 children with cancer to a group of similar children without cancer. They found that those who lived in a town that could have exposed them to higher than average RF radiation from cellular phone towers in the previous 5 years had a slightly higher risk of cancer, although not of any certain type of cancer (like leukemia or brain tumors). This study estimated the children’s possible exposure based on the number of towers in their town and how strong the signals were from the towers. It did not look at actual exposure of any individual child based on how far their home or school was from a tower.
One study looked for signs of DNA and cell damage in blood cells as a possible indicator of cancer-causing potential. They found that the damage was no worse in people who lived near a cell phone tower as compared with those didn’t.
The amount of exposure from living near a cell phone tower is typically many times lower than the exposure from using a cell phone. About 30 studies have looked at possible links between cell phone use and tumors in people. Most studies to date have not found a link between cell phone use and the development of tumors, although these studies have had some important limitations.
Studies done in the lab
Laboratory studies have looked at whether the types of RF waves used in cell phone communication can cause DNA damage. Most of these studies have supported the idea that the RF waves given off by cell phones and towers don't have enough energy to damage DNA directly.
Some scientists have reported that the RF waves may produce other effects in human cells (in lab dishes) that might possibly help tumors grow. However, these studies have not been verified, and these effects weren’t seen in a study that looked at the blood cells from people living near a cellular phone tower.
Several studies in rats and mice have looked at whether RF energy might promote the development of tumors caused by other known carcinogens (cancer-causing agents). These studies did not find evidence of tumor promotion. Research in this area continues.
Source: Cancer.org - Cell Phone Towers
Image Source Safe Space: Ionising and Non-Ionising Radiation
Though it is a popular belief that excessive cell phone usage and high proximity of cell towers cause cancer, but there isn't substantial scientific evidence to support this claim. This doesn't mean there aren't risks that come with cell tower proximity; there could be risks we don't know of yet. The research done isn't enough to give a definitive answer. In any case, take precautions, because there might be a link and we just don't know of it yet.
PS: Watch Veritasium's video Do Cell Phones Cause Brain Tumors? for a more info.
Source of Quotations: Wikipedia - Mobile Phone Radiation & Health