On June 12, 2012, the International Agency for Research on Cancer (IARC), which is part of
the World Health Organization, announced that it has classified diesel exhaust as a Group
1 "agent carcinogenic to humans." What this means is that according to IARC, sufficient
evidence shows exposure to diesel exhaust gas causes cancer in humans - specifically lung
cancer, with a possible link to bladder cancer.
Even though today's Tier 4 engines are designed to reduce diesel exhaust particulate
emissions, it is unknown if cancer risks to humans is reduced; and animal studies continue
to show non-cancer adverse changes in lungs such as inflammation and lesions.
The IARC Press Release can be found here.
Many amusement train rides operating around the world today are powered by internal
combustion engines fueled by gasoline, propane, and diesel. The arrangement of the
typical train puts these internal combustion engines in a box at the head of the train. In
most cases, the exhaust port is located so it emits hot combustion exhaust into the air
directly in front of the passengers, and sometimes directly in front of the ride operator
who can spend hours each day exposed to these emissions. Children and the elderly, who
often are the primary demographic on amusement train rides, are listed as most at risk to
the effects of exposure. If a train ride has a tunnel on the route, the exposure is further
concentrated into the breathing zone of everyone on the ride who passes through it.
One of the clear advantages of our battery-electric trains is they
produce zero exhaust emissions. ZERO.
The result is a healthier environment, higher rider satisfaction and
significant reduction of the ride owner's liabilities to the general
public and their employees.