Question

Smartphones are not good for society because they can negatively impact our health. For example, too much time spent on a smartphone can lead to problems like poor sleep. Also, if we use our smartphones too much, then we might move our bodies less. In other words, we might not get enough exercise, which can lead to health problems in the future. Overall, smartphones can impact our health in negative ways.
The Children’s Hospital of Philadelphia explains that technology causes teens to “spend more time online and less time socializing with friends in person.”
According to South University, “Small text and bright screens can strain mobile phone users’ eyes.”
The National Library of Medicine, the world‘s largest medical library, states that “mobile devices and apps provide many benefits” for doctors as they care for patients.

Answer 1

Do you want this edited for clarity/flow, strengthened with stronger evidence, or turned into a short essay? Below I’ve done a concise revision that improves flow and balance, plus practical suggestions for sources and ways to strengthen the argument.

Revised paragraph (balanced, cohesive)
Smartphones can harm public health in several ways. Excessive smartphone use is linked to poorer sleep — screens’ small, bright displays and nighttime use can delay sleep onset and reduce sleep quality — and displacing time that could be spent being physically active may increase future risk of obesity and other sedentary-related problems. For adolescents, experts at the Children’s Hospital of Philadelphia note that more time online can mean less face‑to‑face socializing, which may affect social development. At the same time, smartphones also have important benefits: the U.S. National Library of Medicine highlights how mobile devices and apps can help clinicians care for patients. Overall, acknowledging those benefits, public-health concern remains justified because routine overuse by many people poses measurable risks to sleep, physical activity, vision, and mental well‑being.

Suggestions to strengthen this argument
- Use higher-quality, peer‑reviewed sources for each claim (systematic reviews/meta-analyses on screen time and sleep; WHO or national public-health guidance on physical activity and sedentary behavior; pediatric society recommendations on adolescent screen time).
- Quantify where possible (e.g., typical effect sizes, prevalence of problematic use, odds ratios) so the claims are concrete rather than general.
- Distinguish population groups: adolescents and young children are more vulnerable to social and developmental effects; adults may face different risks/benefits.
- Address counterevidence directly: acknowledge clinical/healthcare benefits of mobile tools (telemedicine, decision support) and explain why widespread personal use still creates public-health harms (scale, displacement of activity, sleep disruption).
- Add practical mitigation measures: screen curfews/bedtime tech limits, blue‑light filters and reduced brightness at night, scheduled physical-activity breaks, ergonomic and vision-protective habits.

Sources and search tips
- Look for systematic reviews or large cohort studies on screen time and sleep in Sleep Medicine Reviews, JAMA Pediatrics, Pediatrics, or BMJ.
- Check guidance from reputable bodies: American Academy of Pediatrics, WHO, Centers for Disease Control, and national pediatric societies.
- Use the National Library of Medicine (PubMed) to find primary studies and reviews; for policy statements use official hospital or public-health webpages (e.g., CHOP).

If you want, I can:
- Add properly formatted citations for the claims above.
- Expand this into a full paragraph, section, or short essay with evidence and references.
- Rewrite for a specific audience (school board, general public, academic paper).