Rowan berries are generally considered non-poisonous for humans when consumed in small quantities. However, they can cause mild stomach upset or diarrhea if eaten in large amounts. It is important to note that some people may have allergies or sensitivities to certain compounds in rowan berries, so it is best to consume them in moderation. Additionally, rowan berries are toxic to some animals, so it is important to keep them away from pets. **

A hydrogen fuel cell produces energy through an electrochemical reaction between hydrogen and oxygen. Hydrogen gas is fed into the anode side of the fuel cell, where it is split into protons and electrons. The protons travel through an electrolyte membrane to the cathode side, while the electrons flow through an external circuit, creating an electric current. At the cathode, the protons, electrons, and oxygen from the air combine to produce water and release energy in the form of electricity. **

Green bananas are not poisonous, but they may cause digestive discomfort for some people. Green bananas contain resistant starch, which can be harder for the body to digest and may cause bloating or gas. As the bananas ripen and turn yellow, the resistant starch is converted into more easily digestible sugars, making them easier on the stomach. Therefore, it is safe to eat green bananas, but some individuals may want to wait until they ripen for easier digestion. **

No, dried green peas are not poisonous. In fact, dried green peas are a common ingredient used in cooking and are safe for consumption. However, it is important to ensure that dried green peas are properly cooked before eating to avoid any potential digestive issues. **

Yes, parts of poisonous plants can sometimes be treated to make them non-toxic. This process usually involves specific methods such as drying, cooking, or fermenting the plant parts to break down or remove the toxic compounds. However, it is important to note that not all poisonous plants can be made safe for consumption through treatment, and caution should always be exercised when dealing with potentially toxic plants. Consulting with a knowledgeable expert or botanist is recommended before attempting to treat any poisonous plant for consumption. **

No, the Green Tree Frog is not poisonous. While they do secrete a mild toxin from their skin as a defense mechanism, it is not harmful to humans. In fact, Green Tree Frogs are popular as pets due to their vibrant coloration and friendly demeanor. **

Green strawberries are not poisonous, they are just unripe. They are safe to eat, but they are very sour and not as sweet as ripe strawberries. As the strawberries ripen, they will turn red and become sweeter in taste. **

A hydrogen fuel cell is a device that converts the chemical energy of hydrogen and oxygen into electricity through an electrochemical reaction. It consists of an anode, a cathode, and an electrolyte membrane. Hydrogen gas is fed into the anode, where it is split into protons and electrons. The protons pass through the electrolyte membrane to the cathode, while the electrons flow through an external circuit, creating an electric current. At the cathode, the protons, electrons, and oxygen from the air combine to produce water and heat as byproducts. This process is clean and efficient, making hydrogen fuel cells a promising alternative to traditional combustion engines. **