The AQI scale categorises air quality from 0 to 500: 0–100 is ‘good’, 100–200 is ‘moderate’, 200–300 is ‘poor’, 300–400 is ‘very poor’, and above 400 is ‘severe’. Doctors have attributed the worsening ...
Scientists have found a new treatment for people with asthma and chronic obstructive pulmonary disease (COPD) that may be more effective than current options. Over the past 50 years, treatment options ...