What did scientists at the Natural History Museum discover by comparing historical and modern samples of shelled organisms?

• Modern organisms had significantly thicker shells.

• Historical organisms were found to be extinct.

• Modern organisms' shells were up to 76% thinner.

• The shell composition had changed from calcium to silica.

What was the primary cause of the mysterious mass die-off of oyster larvae in Washington State hatcheries in the early 2000s?

• A new viral infection affecting oyster populations.

• Increased water temperature due to climate change.

• Ocean acidification preventing shell formation.

• Overfishing leading to a decline in adult oysters.

How has the ocean's pH level changed since the Industrial Revolution, and what does this indicate about its acidity?

• It has decreased from 8.2 to 8.05, indicating an increase in acidity.

• It has increased from 8.05 to 8.2, indicating a decrease in acidity.

• It has remained stable at 7, indicating neutrality.

• It has fluctuated wildly, showing no clear trend in acidity.

What condition, analogous to osteoporosis in humans, is caused by ocean acidification and leads to the weakening of coral structures?

• Coral bleaching.

• Coral porosis.

• Coral calcification.

• Coral erosion.

What are the primary effects of ocean acidification on marine ecosystems?

• Decreased temperature, increased acidity, increased oxygen.

• Increased temperature, decreased acidity, increased oxygen.

• Increased temperature, increased acidity, decreased oxygen.

• Decreased temperature, decreased acidity, decreased oxygen.

Which marine organism is described as the "original poster child" of ocean acidification due to its shells dissolving?

• Salmon

• Scallops

• Pteropods

• Sea urchins

What is considered the single most important measure to tackle ocean acidification?

• Growing more seagrass and kelp.

• Reducing fossil fuel consumption.

• Developing ocean-assisted carbon capture plants.

• Restoring ocean pH levels to historical values.

What is a key advantage of Heimdal's ocean-assisted carbon capture technology compared to direct air capture?

• It is significantly cheaper to operate.

• The ocean contains a higher concentration of carbon dioxide by volume.

• It can restore ocean pH levels to pre-industrial levels instantly.

• It requires fewer units to capture global CO2 emissions.